I think you underestimate how dependent some Twitter users are on recursive blocking to avoid interacting with people who have nothing better to do than brigade them on behalf of their favorite parasocial celebrity relationship.

Like you seem to imagine that Twitter is this enlightened Socratic circle and how dare you censor opinions in the marketplace of ideas when it's really just no life edgelords who get off on saying hurtful things to minorities and then being like "u mad pepolaugh?"

Encouraging brigading by angry mobs is something that Big Tech deliberately design into their platforms. It helps boost their "engagement" stats, so they sell lots of ads by doing it. The marginalized minorities who are put off from e.g. Twitter due to all the angry hate that results from this are too few and far between to matter, they simply don't enter into the Big Tech AI-bots' unforgiving calculus of what's "optimal" for the site.